Wheel-forging mill.



J. SLATTERY.

WHEEL PORGING MILL. APPLICATION I'ILBD JAILZO, 1909.

1, 1 07,7 1 7. Patented Aug. 18, 1914 2 SHEETS-SHEET 1.

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J. SLATTERY.

WHEEL FORGING MILL.

w, m w W@ qw A m 4m e no m I 10W mw w Q W W. ww M m N m m m m m v M. n o m rHE Nomvls PETERS C0. PNOTOL/TNO.. wAamlNcmh JOHN SLATTERY, OF CHROME, NEW JERSEY.

WHEELORGING MILL.

Specitcation. et' Letters is, rari.

Application filed January 23, 1969. Serial No. 473,267.

To all whom it may concern Be it known that I, JOHN Sinvnrnlir, a citizen of the United States ot' America, and a resident of Chrome, county ot' Middlesex, State of New Jersey, have invented a eertain new and useful lVheel-Forging Mill, oi which the following is a specification.

My invention relates to apparatus :tor forging ear wheels and the like, and oomprises in a single strueture, means tor tir-st pressing a suitable blank between dies, thus eompaeting the metal to a considerable ei:- tent, closing pipes, pores and the like, and reducing the width oit the blank oonsiderably; means for hammering,l the tread of the pressed blank, to harden, compact, and tonghen the metal o't the tread; and means for rollingthe tread of the wheel to make it smooth and to make the wheel. truly round.

My invention further comprises a novel mandrel for supporting the wheel during these various operations, said mandrel composed oit' two parts relatively interloeked tor strength and rigidity, and being); combined with dies for pressingthe wheel. separating the parts of this mandrel it is relatively easy to introdure a blank into the mill, the parts of the mandrel being brought to gether again when the blank is in place; and after the completion oi the operations on the blank, the finished wheel may be removed bv again separatingthe members of the mandrel.

lt is very important that the tire or tread ot a` ear wheel shall be of a `very hard and tough steel. A tire of sueh material not only has greater inherent enduranre that the best ehilled east iron, or than softer steel, but has tar greater capacity to resist the formation of flat spots and so does not require truingas frequently as does the chilled iron or soft steel Jread. Flat spots on the treads of car wheels are usually due to slipping ot the wheel on the track after the application of the brake, and necessitate theA removal. ot the wheel from the ear and its traina` up by ,La-indian or turning` down the tread of the wheel. Not only does this truing' remove a considerable proportion ot' the material ot the wheel rim, so reducing' eorrespondingly the iiiermissible mileage ol the wheel, but it utwessitates laying;l up thev ear Jfor a eonsiderable period ot' time, and considerable expense in maehining' and grind ing; the total expenses troni these causes and from the decreased mileage oit the wheel ,being` very (ainsiderable. ly ordinary methods oi. :forgingl or pressing` steel wheels, it is ilnprssible to produce a wheel having a rim or tread ot the desired hardness, because the hub o't' the wheel must be of metal sott enough to permit the hub to he bored trr the rereption oLI' the axle, and because a relatively sott grade ol" steel must be used to permit the extreme alteration oit seetion involved in convertingl an innot or billet into a 'forged or pressed ear wheel. Sueh 'wheels being' formed in one piece, are necessarily the same grade ot steel throughout. rlhe present invention, however, overcomes these ditlieulties in produeingl a one piece car wheel iaving' a tread surfacewhich is quite hard and very tough, while the hub portion is inueh solter. The inereased hardness and toughness of the tread portion is due to the hammeringl whit-h that portion ot 'the wheel revolves. as above referred to. lt is well knmvn that hammered steel suspasses steel ot equal grade redufed to 'torni by any other method, in density, hardness, toughness, and other desirable qualities. ln these respeots hammered steel is tar superior to rolled steel.

My present invention provides a single structure wherein the operations required for Forming a wheel having' a hammered tread-surifare, involving' the pressing ot' the blank, the hammering' ot the tread, and the rolling; ot the wheel. may all be pertormed with one settingr ol the blank.

The objeet o't' my invention is to provide a simple. durable and easily operated apparatus by whioh all ot' the operations involved in toi-ming! a hammered wheel trom a rast blank, may be perlornual with one setting of the blank.

In the aeeompanyinp; drawings l illustrate one t'orm of my said ear wheel forgingV mill.

ln said drawings: Figure l shows a top view and partial section ot the mill; Fie'. E2 shows a side elevation ol the mill; Fin'. 2% shows a detail ventral vin-tical section through the mandrel. Fie'. #l shows an end view ot the mill; and Fin'. 5 shows a detail side view ol" one ol' the stepping.;` pawls and adjarent parts. the paw! brina' shown in the vertiral or inaetve position.

ln the dra.vin e' numerals l, l desin'nate massive uprie'ht 'l'rames and 2 and Si desiek nate parts ot' a mandrel adapted to support tilt llO

'the influence of suitable means, such as a hydraulic ram 7. The mandrel member 3 is made movable axially both to permit mounting the wheel blank upon the man* drel and to permit pressing of the wheel blank; for said blank, when first introduced, is somewhat broader than the final wheel.

Above the mandrel is located a hammer die S, the face of which is shaped to correspond to the shape to be given to the wheel-tread; this die being mounted to slide up and down in guides provided between the uprights, This hammer die may be driven against the wheel tread in any suitable manner. 1 have illustrated for the purpose a hammer head 9 which may be considered to be the head of a steam hammer, of which 10 is the piston rod and 10 the frame, said frame mounted on the uprights 1. 1 do not illustrate the complete steam hammer, as such hammers are well known.

11 designates a power shaft mounted in suitable bearings and arranged to be driven in any suitable manner. 12 designates a gear wheel mounted on this shaft, 18 a ratchet wheel concentric with said shaft but secured to the hub of the mandrel member Q, 1 4 designates a similar ratchet wheel secured to the hub of the mandrel member 3, and 15 and 16 designate respectively, the two jaw members of the jaw clutch, member 15 being secured to ratchet wheel 13 and member 16 being splined to and arranged to slide axially upon, shaft 11; suitable shifting means, such asthe lever 17, being provided for shifting said clutch member.

18 designates a cam shaft mounted in bearings in the frame of the machine and arranged to be driven from gear 12 and shaft 11 by a gear wheel 19. Upon this shaft 18 are twocams 2O arranged together with springs 21, to actuate stepping pawls 22 bv which ratchet wheels 13 and 1st may be advanced step by step. These pawls are pivoted to the frame of the machine, are arranoed to be alternately depressed by their respective cams QG and to be raised by their springs 21, and are provided with pivoted end nieces E23 adapted to engage the teeth of ratchet wheels 13 and let respectively. The pivotal connection of these end pieces 23 with the main portion of the pawls, is by a knife joint, which holds the end piece rigid with the pawl when said pawl is actuated by the cam to move the corresponding ratchet wheel, but which yields during the return movement of the pawl, so permitting said pawl to pass to the next ratchet tooth. These pawls are provided with springs 24e tending to hold the end pieces of the pawls as nearly as may be in line with. the main portions of the pawls. y

designates a. roll having a peripheral contour adapted to produce, on the wheel blank, the desired contour of tread and flange. This roll is mounted upon a shaft 26 itself mounted in bearing blocks 27 mounted in guides in the uprights of the mill and arranged to be moved in and out by suitable means, as for example, screws 28.

29, in Figs. 1 and 3, designates the wheel after it has been compressed axially, hammered and rolled to proper form.' This wheel is shown mounted on the two-part mandrel, mandrel member 3 having a central shaft 30 projecting through the hub hole of the wheel into a corresponding recess of mandrel member 2. Mandrel member 3 also has other projecting pins 31, of large size, hitting within suitable corresponding sockets in mandrel member 2, and so interlocking the two sections of `the mandrel so that not only must said two sections rotate together, but that they form substantially a single structure to resist the blows of the hammer'. The wheel indicated in the drawings is a spoked wheel, and therefore, to adequately support the rim of the wheel during the hammering and pressing, mandrel member 3 is provided with projections adapted to project through the spaces between the spokes of the wheel.

The manner of forming a wheel in this mill is as follows: Member 3 of the mandrel having been withdrawn until its projecting center pin 30 is substantially iiush with the inner face of the corresponding column 1 of the mill, a. cast wheel blank is introduced between the members of the mandrel and centered with respect thereto, and then the mandrel member 3 is forced in again, vforcing said blank upon the projections 32 of mandrel member 2, and at the same time forcing center pin 80 through the hub-hole of the wheel blank. The wheel blank when first introduced is considerably broader across itsI face than the finished wheel is to be, and when the said wheel blank has been mounted upon the mandrel as just described, the advance of the mandrel member 3 is continued., sai-:il mandrel member 3 and the corresponding member 2 acting as press dies to press the wheel axially, so reducing its width to that desired for the final wheel.. During these operations the hammer block 8 has been raised clear of the wheel blank. The shaft 11 is now rotated, clutch 15 1G being opened, and the pawls 22 are caused -to step the mandrel and wheel around, tooth by act upon the periphery of a blank so held, bearings for said roll movable in guides provided on said frame, and means for moving said bearings in and out.

l2. A Wheel forging mill comprising in combination means lor rotatably supporting a. blank Comprising a two-part maiulrel, means for hammering the pe'iphery of the blank, a dri'fe shaft, step by step mechanism for rotating the mandrel driven from said drive shaft, a clutch adapted to operatirel,V connect said drive shaft and mandrel, and. means for rolling the blank,

13. Cooperating Wheel-forgin' dies adapt ed to together form a mandrel for the wheelblank, comprising two dies adapted to press a wheel between them and having interloeling members whereby the tn'o dies are interloeked when. a wheel is held between them, the said members of one said die adapted 'to Gopies of this patent may be obtained for nve cents each, by addressing the Commissioner of Patents, l

Washington, D. C.

pass through openings in the Wheel blank near the rim thereof and thereb7 to support the portions vof the rim which are opposite said openings.

1l. Cooperating Wheel-forging dies adapt-v ed to together form a, n'landrel for the wheelblank, comprising two dies adapted to press a spoked wheel between them, one of said dies having projections adapted to project through the spaces bet-Ween `the spokes of the blank and 'to support the portions of the Wl eel-tread which are opposite said spaces. ln testimony whereof l have signed this specification in the presence of two subscribing Witnesses.

JOHN SLTTERY.

llf'itnesses: I

Hf. M. lE/IARBLE, FRAN 1i E. RAFFMAN. 

